Welding-electrode holder



March 22, 1938. PAESAM 2,111,803

WELDING ELECTRODE HOLDER Filed March 29, 1937 IIIIIIIIIIIIIIII INVENTOR. WON/91.0 Pisa/w.

BY WJM ATTORNEY;

Patented Mar. 22, 1938 UNITED STATES PATENT OFFICE WEIDING-EIEOTBODE 1101mm Romalo Paesani, Detroit, Mich. Application March as, 1937, serial No. 133,534

. Claims. My invention relates to welding-electrode holders and an object of my inprovements is toimprove and simplify the construction, while providing an instrument which will facilitate the 5 manipulation of the electrode and hold the same firmly clasped I secure this object in the construction illustrated in the accompanying drawing in which:-

Figure 1 is a side view of an electrode holder.

1a Figure 2.

2 is a. heat-insulating handle having a coaxial bore therethrough. 3 is a metal electrode-holder formed at its right hand end into a ferrule,

- 3a, which engages in the inner end of the handle I! 2. 4 is an electric cable passing into the right hand end of the handle 2, its conductive portion engaging in the ferrule 3a. 24 is aset screw passing radially through the wall of the handle 2 and ferrule 3a, its inner end engaging against the conductive portion of the cable 4 and pressing it into electrical contact with the opposite side of the wall of said ien'ule, as shown in Figure 1. v 5 is a clamping head on the outer end of the holder3, integral therewith and having a slot 5a therein extending slantin'gly inward from one side thereof and toward the outerend of the same as shown in Figures 2 and 3. Said slot also slants toward the outer'end of said head from the top to "the bottom of the same as shown in 35 Figure 1. 5b is a cylindrical bore through the inner wall of the slot 5a, its axis being parallel, and offset with reference to the axis of the handle 2. 1 is a plunger fitting and adapted to reciprocate in the bore 511. 40 iii-3b, are lugs upon the holder 3, extending upward toward, and located at the right of the inner end of the bore 517. 6 is a lever arm pivoted at in. between lugs 3b, extending upward and slanting toward the inner end of the bore 5b and 45 pivoted at 6b to the inner end of the plunger 1-. The lever 6 bends inward and extends over and nearly parallel to the handle 2. 8 is a compression spring between the holder 3 and the lever arm 6 acting to press said arm upward, turning 50 the same about the pivots 6a. and 6b, and pressing the outer end of the plunger 1 with a toggle lever action, against the outer wall of the slot 50, or the interposed electrode 9 and the-surface oi the bore 5b, and with a force augmented by the leverage at which the spring 8 acts and that at which the force is applied to the plunger 1 at to.

In some instances I cover the inner end of the plunger i and the opposite wall-surface oi the slot in. with a specially durable metal as indi- 5 cated in Figure 1.

In use the handle 6 is depressed, withdrawing the plunger. The electrode, as 9, is inserted between the end of said plunger and the wall of the slot 50, and the handle released. The spring 10 8 then throws the lever arm 6 outward iorcing the plunger I forward and firmly clamping the electrode 9 in position.

The electrical contact, is now good and the electrode is held so firmly in place that it may 16 be bent to any extent desired without displacing the same. a.

It will be noted that the electrode is easily adjusted to place and that the contacts are good, the spring 8 is so located that it will not overheat 20 and that the construction is simple and strong with few parts that may be readily assembled.

What I claim is:--

1. In a welding-electrode holder, a reciprocating plunger, a shoulder opposed to one end of 5 said plunger, a lever arm pivoted to said holder and to said plunger, said plunger fitting, and being adapted to reciprocate in a bore between said shoulder and its said pivotal point, and a spring acting upon said lever to force said plunger toward said shoulder and the surface of said bore the line between the axes of said pivots being inclined with reference to the line of travel of said plunger.

2. An electrode holder having a slot extending from its side slantingly inward and also slanting between the top and bottom.

3. An electrode holder having a slot extending from its side slantingly inward and alsoslanting between the top and bottom, and a plunger 4 adapted to clamp an electrode against a wall of said slots.

4. A welding electrode holder having a handle at one end thereof, said holder extending in line with said handle from one end thereof and then bending upward and then again bending and extending in a head parallel to said handle and holder and off-set in reference thereto, said head having a slot extending inward from a side thereof and a bore'formed through the wall of said 5 slot toward said handle, a plunger fitting and adapted to reciprocate in said bore parallel to said handle and holder, a lever arm pivoted to said holder where it bends from the line of said handle, and also pivoted to the adjacent end 0:15

lever arm and said holder adjacent to said handle.

5, '1l'1e construction of claim 1 when the clamping face of said shoulder is inclined in the opposite direction to that of the line between said pivots.

ROMALO PAESANI. 

